I bought a gun kit a couple years back and just recently finished it . The problem now is I've gauged it Go No Go and the No Go goes. Not sure what I need to do now.

From what I understand to check headspace on an AK style weapon you need to remove the extractor..... or was that ar's? LOL I understand the reason for checking headspace but in the case of an ar what the hell could you do about it. Sorry didn't mean to derail your post

On any gun you want to remove as much stuff as possible to keep it from impeding on the gauges, as for the AR you have to remove the ejector and the extractor as for the AK you have to remove the extractor since the ejector is on the receiver.

As for your question about what you could do about fixing the headspace on an AR you can take it to a gunsmith to take off the barrel and have the headspace corrected on a lathe

On any gun you want to remove as much stuff as possible to keep it from impeding on the gauges, as for the AR you have to remove the ejector and the extractor as for the AK you have to remove the extractor since the ejector is on the receiver.

As for your question about what you could do about fixing the headspace on an AR you can take it to a gunsmith to take off the barrel and have the headspace corrected on a lathe

I have never had that problem myself but that makes sense. I figure you take material off the barrel extension not the upper. I have threaded and chambered bolt actions before under a master Gunsmith. That's why I have probably the only SMLE in 243 win. with that long mag/action a I can shoot them Berger 105gr though my mag not single load